How can I turn off TERRIBLE Rubber band scrolling

Rubber band scrolling makes using Safari unbearable for me. I have a Magic Mouse and I rest my finger on it all the time. The SLIGHTEST quiver of my finger and the web page shakes and shimmies. It drives you to distraction. I can find no way to turn if off AND keep the ability to scroll up and down.

Please please please can someone help me.